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Power Plant Pump Control Guide

1. The document provides notes on the auto start sequence for the MDBFP pump. It describes the contacts and signals involved to start the pump automatically when certain conditions are met like the turbine running and other pumps tripped. 2. It outlines the time delays for energizing the hydraulic coupling and closing the breaker to start the pump. Interlocks like scoop position and permissives are also described. 3. Modifications needed to allow manual start of the pump even when the auto/manual switch is in auto position are noted at the end.

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403 views6 pages

Power Plant Pump Control Guide

1. The document provides notes on the auto start sequence for the MDBFP pump. It describes the contacts and signals involved to start the pump automatically when certain conditions are met like the turbine running and other pumps tripped. 2. It outlines the time delays for energizing the hydraulic coupling and closing the breaker to start the pump. Interlocks like scoop position and permissives are also described. 3. Modifications needed to allow manual start of the pump even when the auto/manual switch is in auto position are noted at the end.

Uploaded by

HKVMVPVPV021511
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOC, PDF, TXT or read online on Scribd
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NOTES ON MDBFP AUTO START

1. "TDBFP Tripped " contact is generated from trip oil pressure very low (2 out of 2 logic). Turbine running contact(Derived from Turbine speed > 500 RPM) is used for runback in CMC. 2. " Scoop tube at minimum" permissive will be bypassed if MDBFP Auto/Manual switch is in Auto mode. 2(a) If MDBFP Auto/Manual switch is kept in MAN mode and if pump is not running , scoop tube will drive to minimum position without human intervention and permissive will also present. 3. Recirculation valve will be in auto and in full open condition and it will be regulated with MDBFP Pump suction flow. 4. 2TF3 is a time delay to drop out relay and set for 7 sec .This relay contacts were used for Energizing /De-energising the hydraulic coupling rapid start solenoid valves. 5. 2TF2 is also a time delay to drop out relay whose contacts are going to close the MDBFP breaker .Auto start command is parallel to the Manual start command. 6. "Pump not running and drive scoop to minimum" interlock will be bypassed and scoop is to be kept in auto, so that it will track FW pump Master command. 7. When unit is not running / MDBFP not available , MDBFP Auto /Manual Switch is to be kept in "Manual" position.

1LR1 BFP-A TRIPPED

2LR1 BFP-B TRIPPED

2K87 BFP-C ON AUTO

7 8

4A
MANUAL BFP-C START COMMAND

M A

BFP A/B TRIPPED

5 6

5 6 2K88
10

4B
MDBFP NOT RUNNING L1

2LR8

2K87

2TF3
L2

BFP-C ON AUTO

BFP-A/B TRIPPED

BFP-C AUTO COMMAND

X2395 / 9

ARP 3S/K41

ARP3S/59

SBF31J
4A MDBFP START SWITCH HS-0699A 4B X2395 / 10
ARP 3S/K42 L

START(S)

ARP3S/59

HC RAPID START START SOL.VALVES


240 V AC (UPS)

1 5

2 6 2TF3

SV91

SV92

3P37 220 V DC FROM BKR CKT

PR1 PR2 PR3


7 8

SCOOP AT MINIMUM PR5

MDBFP ON AUTO 2K87

PR9

3P38

NOTE: PR1 TO PR9 ARE THE PERMISSIVE FOR STARTING MDBFP


" SCOOP AT MINIMUM" PERMISSIVE IS IN PARALLEL WITH "MDBFP ON AUTO " CONTACT

220V DC BFP-C BKR CKT

3R01 2K88 3 4 3 2K87 4 BFP-C ON AUTO NAS S BFP-A/B TRIPPED T NAT

2TF2

BFP-C START RELAY

Modification for Manual Starting of MDBFP even when Auto/Manual switch is kept in Auto position Requirement: 2 cables (cores) from ARP-3 to UCB (Near) switch-HS0699A) Existing available cable:

X2452 X2453

BF31J 14C
ARP-3

ARP-3R 13 TO 22
ARP-3 S59

X2395 / 9

S41

START

SBF 31J K,L CORES

10

S42

S60

MD BFP START/STOP SWITCH (HS-0699A)

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